A 100% first-year capital allowance applies until 31 March 2026 for Corporation Tax and 5 April 2026 for Income Tax for zero-emission vehicles, although leasing companies are unable to claim the allowance.
Full expensing
Capital allowances based on full expensing apply until 31 March 2027, following the success of the 130% super deduction introduced in 2021.
Full expensing enables businesses to deduct 100% of outright purchase expenditure from their profits before tax on new main rate equipment items, such as electric charging equipment, vans and trucks (provided the Plug-in Grant has not also been claimed), but excluding company cars. The Government will explore extending full expensing to assets bought for leasing or hiring when fiscal conditions allow.
Lease rental restriction
Lease rentals on company cars can be offset against tax, with the threshold set at 50g/km of CO2. New cars with CO2 emissions of 50g/km or less are eligible for 100% of payments to be offset, while only 85% is claimable for those with CO2 emissions of 51g/km or more.
Fuel allowances
The Fuel Benefit Charge (FBC), used to calculate BIK tax for drivers receiving employer-provided fuel for private mileage in a company car, rises to £28,200 from 6 April 2025.
The current freeze on fuel duty continues until April 2026.
Calculating tax due on employer-provided fuel for private use
Example:
A new car with WLTP-derived CO2 emissions of 194g/km is subject to 37% BIK tax in 2025/26.
Assuming it has a Worldwide Harmonised Light Vehicles Test Procedure (WLTP) combined fuel consumption of 38.2mpg. £28,200 x 37% gives a taxable value of £10,434. Multiplying by the driver’s income tax rate derives annual tax of £10,434 x 20% = £2,087, or £10,434 x 40% = £4,174. With the average price of diesel at £1.40/litre (March 2025), £2,087 will buy around 1,445 litres for a 20% taxpayer. For a 40% taxpayer, it is around 2,895 litres.
Multiplying each by this example car’s combined fuel consumption of 38.2mpg gives 12,147 miles for a 20% taxpayer or 24,333 miles for a 40% taxpayer – the minimum private mileage you need to cover to make the ‘free’ fuel benefit worthwhile.
If your private mileage is less than the calculated figure, paying for the fuel yourself will cost less than the tax. If it is greater, you are better off paying the tax. As electricity is not a fuel it has no scale charge, meaning drivers of 100% electric cars are exempt from fuel benefit tax.